Article
Physics, Applied
E. Alex Wollack, Agnetta Y. Cleland, Patricio Arrangoiz-Arriola, Timothy P. McKenna, Rachel G. Gruenke, Rishi N. Patel, Wentao Jiang, Christopher J. Sarabalis, Amir H. Safavi-Naeini
Summary: This study investigates the performance of microwave-frequency phononic crystal resonators integrated with superconducting quantum circuits on thin-film lithium niobate. By exploring different design geometries, high mechanical internal quality factors were achieved, allowing for the indirect observation of phononic bandgaps and an analysis of loss channels' impact on device performance. An anomalous low-temperature frequency shift consistent with resonant TLS decay was observed, highlighting the potential role of material choice in mitigating losses.
APPLIED PHYSICS LETTERS
(2021)
Article
Optics
Thomas E. Maybour, Devin H. Smith, Peter Horak
Summary: In this study, the effect of slow light on second-harmonic generation in a periodically poled chi((2)) nonlinear medium is investigated theoretically. A linear pi phase-shifted grating is used to slow down the group velocity of the fundamental frequency, resulting in a significant increase in the efficiency of second-harmonic conversion. The research shows that almost 100% conversion efficiency can be achieved for continuous wave pumping at low intensities.
Article
Engineering, Electrical & Electronic
Sipan Yang, Jinbin Xu, Yaqian Li, Liying Wu, Xueling Quan, Liucheng Fu, Min Liu, Zhengjie Wang, Xiulan Cheng
Summary: The ridge waveguide integrated grating couplers were designed, fabricated, and characterized in lithium niobate on insulator. The devices showed low coupling loss and a broad optical bandwidth, demonstrating potential functionalities for integrated optical waveguide devices based on thin-film lithium niobate.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Optics
Nina Amelie Lange, Jan Philipp Hoepker, Raimund Ricken, Viktor Quiring, Christof Eigner, Christine Silberhorn, Tim J. Bartley
Summary: In this study, researchers demonstrate that spontaneous parametric down-conversion (SPDC) in nonlinear waveguides is fully compatible with the cryogenic operating conditions required for superconducting detectors. By comparing the performance indicators at low temperature and room temperature, they investigate the effect of low temperature on the SPDC process.
Article
Optics
Shuai Wan, Pi-Yu Wang, Rui Ma, Zheng-Yu Wang, Rui Niu, De-Yong He, Guang-Can Guo, Fang Bo, Junqiu Liu, Chun-Hua Dong
Summary: This paper presents a novel scheme for generating self-emerging solitons in integrated lithium-niobate microresonators. By harnessing the photorefractive effect of lithium niobate, the existence range of solitons is significantly extended, and spontaneous yet deterministic single soliton formation is observed. The soliton is immune to external perturbation and can operate continuously for over 13 hours. Turnkey soliton generation is demonstrated using integration with a pre-programmed DFB laser.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Nina Amelie Lange, Timon Schapeler, Jan Philipp Hoepker, Maximilian Protte, Tim J. Bartley
Summary: We have demonstrated the generation of degenerate photon pairs through spontaneous parametric down-conversion in titanium-indiffused waveguides in cryogenic temperatures. A precise empirical model of refractive indices was used to fabricate a fixed poling period due to the inability to temperature tune the phase matching inside a cryostat. By designing the phase-matching properties of the periodic poling, we achieved cryogenic indistinguishable photons at 1559.3(6) nm, despite the potential effects of photorefraction and pyroelectricity. This research confirms our understanding and control of the cryogenic nonlinear process, which has broader implications for combining nonlinear optical processes with other cryogenic photonic quantum technologies.
Article
Materials Science, Multidisciplinary
S. M. Kostritskii, O. G. Sevostyanov, M. Aillerie, E. Kokanyan
Summary: The study found that photorefractive Zr-doped LiNbO3 crystals exhibit optical limiting effects on lower-power laser beams with wavelengths of 514.5 and 532 nm, with samples of specific doping concentrations showing a large gain factor. Based on the relationship between output power and input power, these crystals behaved as hard optical limiters and have potential applications in optical limiting devices.
Article
Optics
Xiaotong He, Luis Cortes-Herrera, Kwadwo Opong-Mensah, Yi Zhang, Meiting Song, Govind P. Agrawal, Jaime Cardenas
Summary: In this work, the authors demonstrate continuous on-chip optical frequency conversion using an electrically tunable lithium niobate ring resonator. Frequency shifts of up to 14.3 GHz are achieved by adjusting the voltage, allowing dynamic control of light behavior within the cavity.
Article
Multidisciplinary Sciences
Ziheng Yao, Xinzhong Chen, Lukas Wehmeier, Suheng Xu, Yinming Shao, Zimeng Zeng, Fanwei Liu, Alexander S. Mcleod, Stephanie N. Gilbert Corder, Makoto Tsuneto, Wu Shi, Zihang Wang, Wenjun Zheng, Hans A. Bechtel, G. L. Carr, Michael C. Martin, Alex Zettl, D. N. Basov, Xi Chen, Lukas M. Eng, Susanne C. Kehr, Mengkun Liu
Summary: s-SNOM is a powerful tool commonly used for infrared nano-spectroscopy, but it lacks sensitivity to in-plane sample anisotropy. Authors introduce a method involving a metallic microdisk antenna to improve sensitivity by probing in-plane phonon responses.
NATURE COMMUNICATIONS
(2021)
Article
Physics, Applied
Zhiwei Wen, Wenjuan Liu, Tiancheng Luo, Xin Tong, Ying Xie, Xiyu Gu, Yan Liu, Yao Cai, Shishang Guo, Jian Wang, Chengliang Sun
Summary: This letter introduces a new type of laterally excited bulk acoustic resonator (XBAR) called SV-BAR, which suppresses higher-order spurious modes effectively by changing the scattering vias in the electrodes. The SV-BAR achieves 50Ω impedance matching and exhibits impressive performance parameters, making it a promising solution for high-performance radio frequency filters in 5G communication.
APPLIED PHYSICS LETTERS
(2023)
Article
Optics
Zhuang Ma, Xiaoyan Zhou, Lin Zhang
Summary: This study presents a thorough investigation on the phase response of an EP system in non-Hermitian systems. The phase response shows distinct behavior depending on the ordering of the ring resonators, resulting in unique group delays. These findings deepen our understanding of EPs and have potential practical applications.
PHOTONICS RESEARCH
(2022)
Article
Physics, Applied
A. R. Will-Cole, Ahmed E. Hassanien, Sila Deniz Calisgan, Min-Gyo Jeong, Xianfeng Liang, Sungho Kang, Vageeswar Rajaram, Isabel Martos-Repath, Huaihao Chen, Antea Risso, Zhenyun Qian, Seyed Mahdi Seyed Abrishami, Nader Lobandi, Matteo Rinaldi, Songbin Gong, Nian X. Sun
Summary: This article introduces N/MEMS technology, with a particular focus on devices based on the magnetoelectric effect. Magnetoelectric N/MEMS couple electrical and mechanical energy using electromechanical resonance under the excitation of a magnetic field and/or electric field, enabling new applications. The tutorial covers the basic principles of piezoelectric materials, resonator design, applications of piezoelectric N/MEMS, as well as the physics, magnetic material properties, state-of-the-art devices, and applications of magnetoelectric N/MEMS.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Zhibo LI, Jack A. Smith, Mark Scullion, Nils Kolja Wessling, Loyd J. J. Mcknight, Martin D. Dawson, Michael J. J. Strain
Summary: This study demonstrates the first heterogeneous integration of pre-fabricated lithium niobate photonic waveguide devices onto a silicon nitride waveguide platform using a transfer-printing approach. The fabrication process developed allows the compatibility of free-standing lithium niobate membrane devices with back-end integration onto photonic integrated circuits.
OPTICAL MATERIALS EXPRESS
(2022)
Article
Engineering, Electrical & Electronic
Amir Youssefi, Itay Shomroni, Yash J. Joshi, Nathan R. Bernier, Anton Lukashchuk, Philipp Uhrich, Liu Qiu, Tobias J. Kippenberg
Summary: This experiment demonstrates the cryogenic electro-optical readout of a superconducting electromechanical circuit using a commercial titanium-doped lithium niobate modulator, achieving coherent spectroscopy and incoherent thermometry. Further optimization of the modulator design could reduce the added noise of the setup to levels similar to current semiconductor microwave amplifiers.
NATURE ELECTRONICS
(2021)
Article
Optics
Ke Zhang, Zhaoxi Chen, Hanke Feng, Wing-Han Wong, Edwin Yue-Bun Pun, Cheng Wang
Summary: High-quality lithium niobate (LN) optical micro-resonators with strong light confinement and intrinsic Q factors over 1 million can be fabricated using optimized lift-off metallic masks and dry etching processes, with a waveguide propagation loss of approximately 0.3 dB/cm. The entire process is fully compatible with wafer-scale production and could be transferred to other photonic materials.
CHINESE OPTICS LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Ning Xie, Yuntao Xu, Jiaheng Zhang, Junjie Chen
Summary: This paper proposes an asynchronous MIMO system with intentional timing offset and designs a Joint Estimation of Channel responses and Phase noises using Intentional Timing Offset (JECP-ITO) scheme based on this system. The advantages of this algorithm in reducing interference and improving performance are demonstrated through theoretical and simulation comparisons.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2023)
Article
Optics
Yue-Xun Huang, Ming Li, Zi-Jie Chen, Yan-Lei Zhang, Xu-Bo Zou, Guang-Can Guo, Chang-Ling Zou
Summary: Mean-field treatment (MFT) is commonly used for approximating the dynamics of quantum optics systems. However, neglecting quantum correlations between modes can lead to unexpected quantum effects. This study presents a theoretical framework based on perturbation theory and MFT to capture these effects and predicts the form and relationship of nonlinear dissipation, parasitic Hamiltonian, and nonlinear coupling rate. The framework is applied to quantum frequency conversion and shows excellent agreement with numerical simulations, revealing the neglected quantum effects by MFT and providing a more precise framework for nonlinear and quantum optics.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Qijing Lu, Lingqin Liao, Longxiang Chen, Junqiang Guo, Ya Hu, Yan-Lei Zhang, Chang-Ling Zou, Xiang Wu, Shusen Xie
Summary: This study investigates the interaction between a microcavity and liquid anisotropic molecules by filling an optofluidic microbubble resonator. Enhanced coupling between the optical mode and the rotation/vibration of molecules leads to the observation of stimulated scattering effects and the generation of quasi-supercontinuum.
LASER & PHOTONICS REVIEWS
(2023)
Article
Engineering, Electrical & Electronic
Yuntao Xu, Jiaheng Zhang, Qihong Zhang, Peichang Zhang, Lei Huang, Ning Xie, Jian Lu
Summary: In this paper, an authentication approach for a spatial modulation (SM) system using physical-layer authentication mechanisms is proposed, which has high security and low complexity. Two physical-layer authentication schemes, PLA-SAT and PLA-SIT, are proposed and compared in terms of compatibility and security. The simulation results show that the authentication accuracy of both schemes is close to one when the received SNR is greater than 20 dB, and the security performances of the schemes improve as the variance of estimation errors increases.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Yuntao Xu, Yanfei Cao, Li Tan, Qiao Chen, Yuanxing Fang
Summary: This study finds that using various cobalt phosphides as co-catalysts can improve the yield and selectivity of photoanodic hydrogen peroxide production, with Co2P exhibiting the best performance.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Optics
Pengfei Yang, Ming Li, Xing Han, Hai He, Gang Li, Chang-Ling Zou, Pengfei Zhang, Yuhua Qian, Tiancai Zhang
Summary: Breaking the time-reversal symmetry of light is crucial for fundamental physics and has gained increasing attention in the study of non-reciprocal photonic devices. In this study, a chiral cavity quantum electrodynamics system with multiple atoms coupled to a Fabry-Perot cavity is experimentally demonstrated. By polarizing the internal quantum state of the atoms, the time-reversal symmetry of the atom-cavity interaction is broken. The strongly coupled atom-cavity system can be described by non-reciprocal quasiparticles called cavity polaritons.
LASER & PHOTONICS REVIEWS
(2023)
Article
Multidisciplinary Sciences
Zhongchu Ni, Sai Li, Xiaowei Deng, Yanyan Cai, Libo Zhang, Weiting Wang, Zhen-Biao Yang, Haifeng Yu, Fei Yan, Song Liu, Chang-Ling Zou, Luyan Sun, Shi-Biao Zheng, Yuan Xu, Dapeng Yu
Summary: Quantum error correction (QEC) protects logical qubits by using a large Hilbert space with redundancy to detect and correct errors in real time. In this study, a QEC procedure was demonstrated in a circuit quantum electrodynamics architecture, where a logical qubit was encoded in photon-number states of a microwave cavity and coupled to an auxiliary superconducting qubit. By applying a tailored frequency comb pulse, error syndrome was extracted and error correction was performed, exceeding the break-even point by about 16% lifetime enhancement. This work illustrates the potential of hardware-efficient discrete-variable encodings for fault-tolerant quantum computation.
Article
Optics
Hao Chen, Zhengyu Wang, Yan Wang, Changqiu Yu, Rui Niu, Chang-Ling Zou, Jin Lu, Chun-Hua Dong, Hongliang Ren
Summary: Whispering gallery mode (WGM) resonators are valuable for precise measurement due to their small size, high sensitivity, and fast response time. This study demonstrates that multimode sensing, utilizing multiple resonances, provides more Fisher information and can achieve better performance than single mode tracking. A temperature detection system based on a microbubble resonator is developed, and a machine learning algorithm is employed to predict unknown temperatures with high accuracy and a large dynamic range.
Article
Physics, Applied
Yuan-Hao Yang, Xin-Biao Xu, Jia-Qi Wang, Mai Zhang, Ming Li, Zheng-Xu Zhu, Zhu-Bo Wang, Chun-Hua Dong, Wei Fang, Huakang Yu, Guang-Can Guo, Chang-Ling Zou
Summary: This study investigates the nonlinear coupling between on-chip confined optical modes and free-space continuum modes. The experiment observed the radiation of second-harmonic wave caused by pump fields in integrated lithium niobate microcavities. The mechanism of nonlinear optical radiation (NOR) is further verified by demonstrating the difference frequency generation between a free-space input and an on-chip pump field. The revealed mechanism of NOR has universal applicability for dielectric photonic integrated devices, allowing for spatial engineering of optical fields and light sources.
PHYSICAL REVIEW APPLIED
(2023)
Article
Physics, Applied
Y. A. Yang, T. A. Zheng, S. -z. Wang, W. -k. Hu, Chang-Ling Zou, T. Xia, Z. -t. Lu
Summary: Quantum nondemolition (QND) measurement enhances detection efficiency and measurement fidelity in precision measurements and quantum information processing. A QND measurement scheme is proposed and demonstrated for the spin states of laser-trapped atoms. This approach utilizes a circularly polarized control laser to create a cycling, spin-selective, and spin-preserving transition on 171Yb atoms in an optical dipole trap.
PHYSICAL REVIEW APPLIED
(2023)
Article
Computer Science, Artificial Intelligence
Zhiwen Chen, Zhigang Lv, Ruohai Di, Peng Wang, Xiaoyan Li, Xiaojing Sun, Yuntao Xu
Summary: Small data volume and data imbalance often lead to statistical failure and restrict the accuracy of data-driven models, becoming a bottleneck problem in small sample modeling. This paper proposes a virtual sample generation method based on acceptable area and joint probability distribution sampling to reduce randomness, improve data consistency, and enhance the accuracy of data-driven models in small samples.
Article
Multidisciplinary Sciences
Xiaoxuan Pan, Zhide Lu, Weiting Wang, Ziyue Hua, Yifang Xu, Weikang Li, Weizhou Cai, Xuegang Li, Haiyan Wang, Yi-Pu Song, Chang-Ling Zou, Dong-Ling Deng, Luyan Sun
Summary: Deep learning and quantum computing have made significant progress in recent years. This work demonstrates the training of deep quantum neural networks using the backpropagation algorithm with a six-qubit programmable superconducting processor. The experimental results show the efficient training of three-layer and six-layer deep quantum neural networks for learning two-qubit and single-qubit quantum channels. This research provides valuable guidance for quantum machine learning applications with current and future quantum devices.
NATURE COMMUNICATIONS
(2023)
Article
Quantum Science & Technology
Ming Li, Yan-Lei Zhang, Xin-Biao Xu, Chun-Hua Dong, Guang-Can Guo, Chang-Ling Zou
Summary: This study explores the continuous-variable quantum entanglement of dissipative Kerr soliton combs in microresonators, uncovering two distinct features: entanglement of comb lines at the spectral edge and diminished entanglement at the center of the spectrum.
ADVANCED QUANTUM TECHNOLOGIES
(2023)
Article
Optics
Cong-Hua Yan, Ming Li, Xin-Biao Xu, Yan-Lei Zhang, Xin-Yue Ma, Chang-Ling Zou
Summary: Manipulating single photons coherently and achieving unidirectional propagation are important goals for integrated quantum information processing. In this study, an external scatterer is introduced to cancel the reflection of photons caused by nonideal chiral interactions in a photonic device. By controlling the interference between reflected photons, the reflection properties of single incident photons can be controlled, leading to unidirectional propagation even with nonideal photon-atom interactions.
Article
Physics, Applied
Mai Zhang, Xie-Hang Yu, Xin-Biao Xu, Guang-Can Guo, Chang-Ling Zou
Summary: By utilizing spatial-temporal modulation, single photon spectral manipulation and motion control of massive particles can be achieved, which is significant for photonics integrated chips and microscale particle manipulation.
PHYSICAL REVIEW APPLIED
(2023)
